Device for removing and replacing engine valves



Nov. 2,1926. 1,605,132

. G. MITCHELL DEV-ICE FOR REMOVING AND REPLACING ENGINE VALVES FailedApril 14, 1924 lllul IN V EN TOR.

A TTORNE Y.

lustrated in Figure 3. The pins 19 are now withdrawn and the valvescanbe removed while the springs are held in place by the locking actionof the lever 13 in its adjusted position.

To remove the springs from the crank case, the plate 5 is lowered by areversed movement of the lever and withdrawn after the springs arebrought in engagement with the recessed bosses 18 which guide the lowerends of the valve stems in their upward motion.

To restore the valves and the springs to their normal co-operativeposition, the springs are first placed in the same position theyoccupied after the plate was withdrawn as shown in Figures 1. and 2, andthe plate 5 is then inserted between the bosses and the cups whichsupport the lower ends of the springs as indicated in Figures 2 and 6,and since this action requires a slight compres sion of the springs, thebevels 17 on the un derside of the plate perform the important andessential function of wedges which gradually lift the cups and therebycause the plate to enter between them and the bosses with little efforton the part of the operator.

After the plate is thus positioned the prop is again placed inengagement with its sup port and the plate is lifted by means of thelever system as before. The pins are now reinserted in the apertures ofthe valve stems after the valves have been replaced and the springs arelowered by a reverse movement of the lever until their cups again engagewith the bosses 18 when the device is finally withdrawn.

Having thus described my invention, what slot having at the underside ofthe plate bevels tapering from said edge, and a lever connected with theplate and adapted to elevate the same.

3. A device of the character described comprising a spring-engagingplate, a lever having an ofiset between oppositely directed arms, apivot-connection between the free end of one of said arms and the plate,a prop pivoted at the juncture of the opposite end of the same arm andthe offset, and an operating handle pivoted at the free end of the otherarm. v

4. A device of the character described comprising a spring engagingplate, a lever having an offset between oppositely directed arms, andhaving one arm pivoted to the plate, a prop pivoted to the leverintermedt ate its end, the pivot of the prop lying beneath the pivotedconnection between the lever and plate when the plate is in elevatedposition to lock the plate in such position and means for operating thelever.

In testimony whereof I have aifiXed my signature.

GEORGE MITCHELL.

